Evolution of polycyclic aromatic hydrocarbons (PAHs) and oxygenated PAHs (OPAHs) in fresh and aged biomass burning emissions

作者：Irini Tsiodra, Maria Georgopoulou, Kalliopi Florou, Christos Kaltsonoudis, Constantine Parinos, Georgios Grivas, Aikaterini Bougiatioti, Spyros N. Pandis, N. Mihalopoulos, Athanasios Nenes · 发表于：Environmental Pollution · 年份：2026 · DOI：10.1016/j.envpol.2026.127654 · 被引用次数：4 · 研究领域：Toxic Organic Pollutants Impact、Air Quality and Health Impacts、Atmospheric chemistry and aerosols

Polycyclic aromatic hydrocarbons (PAHs) and oxygenated polycyclic aromatic hydrocarbons (OPAHs) in the particulate phase of pellet stove and wood stove emissions were measured during a series of experiments at the FORTH Atmospheric Simulation Chamber Facility. Particle-phase polycyclic aromatic compounds (PACs) in emissions were characterized under fresh, daytime-aged (oxidation by OH radicals) and nighttime-aged (oxidation by NO 3 radicals) experimental conditions in the chamber to understand the role of each chemistry mechanism in shaping the PAH/OPAH profiles – under different conditions of humidity. Emissions of PAHs and OPAHs from a stove using pellet fuel were significantly lower, by factors of 4.6 and 3, respectively, compared to those from a conventional wood stove burning hardwood. Σ-OPAH levels were within the same order of magnitude as Σ-PAHs in both types of experiments. The PAHs emission factors of olive wood combustion were determined, and the Benzo(a)pyrene equivalent (BaP eq ) concentration, an indicator of its carcinogenicity, was 14 times higher for wood burning than pellet burning emissions, proving that just the replacement of the old technology heating appliances can reduce significantly population exposure to carcinogenic compounds. The chamber profile of non-volatile PACs produced from biomass burning presented similarities with the ambient biomass burning source profile determined from source apportionment analysis of ambient particle PACs in a Greek u...